Mitosis Flashcards
Cells divide for….
Growth and repair
Every human cell contains how many chromosomes
46
What is the chromosome compliment
The number of chromosomes an organism has in one cell
Chromosomes are organised in..
Matching sets, thereby they’re are 23 in a normal human cell
What are Diploids
A pair of chromosomes
What are the only human cells not to have 46 chromosomes
Sex cells
What are Haploid cells
Cells with half the number of chromosomes (sex cells)
What is mitosis
The process of a cell dividing to form a new cell with exactly the same genetic information
A chromatid is….
Half a chromosome
A chromosome is…
Two chromatids divided by a centromere
What is stage 1 of mitosis
Long un-coiled chromosomes in nucleus replicate
What is stage 2 of mitosis
Chromosomes now appear as two identical chromatids joined together by a centromere
What is stage 3 of mitosis
Nuclear membrane dissipates. Spindle fibres form and chromosomes line up along the equator
What is stage 4 of mitosis
Spindle fibres pull chromatids to opposite ends of the cell/pole
What is stage 5 of mitosis
Nuclear membrane reforms and cytoplasm divides